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author | Ingo Molnar <mingo@elte.hu> | 2009-10-29 09:02:15 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-10-29 09:02:20 +0100 |
commit | 9de09ace8d518141a4375e1d216ab64db4377799 (patch) | |
tree | da8e7a77f4ea91eb3bb73fc6da72ecf8c99e1c16 /arch/x86/kernel/cpu/mtrr/if.c | |
parent | 1beee96bae0daf7f491356777c3080cc436950f5 (diff) | |
parent | 6d3f1e12f46a2f9a1bb7e7aa433df8dd31ce5647 (diff) | |
download | op-kernel-dev-9de09ace8d518141a4375e1d216ab64db4377799.zip op-kernel-dev-9de09ace8d518141a4375e1d216ab64db4377799.tar.gz |
Merge branch 'tracing/urgent' into tracing/core
Merge reason: Pick up fixes and move base from -rc1 to -rc5.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/cpu/mtrr/if.c')
-rw-r--r-- | arch/x86/kernel/cpu/mtrr/if.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/arch/x86/kernel/cpu/mtrr/if.c b/arch/x86/kernel/cpu/mtrr/if.c index f04e725..3c1b12d 100644 --- a/arch/x86/kernel/cpu/mtrr/if.c +++ b/arch/x86/kernel/cpu/mtrr/if.c @@ -96,17 +96,24 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos) unsigned long long base, size; char *ptr; char line[LINE_SIZE]; + int length; size_t linelen; if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (!len) - return -EINVAL; memset(line, 0, LINE_SIZE); - if (len > LINE_SIZE) - len = LINE_SIZE; - if (copy_from_user(line, buf, len - 1)) + + length = len; + length--; + + if (length > LINE_SIZE - 1) + length = LINE_SIZE - 1; + + if (length < 0) + return -EINVAL; + + if (copy_from_user(line, buf, length)) return -EFAULT; linelen = strlen(line); |